Electronic inside rear-view mirror

Abstract

The utility model relates to the technical field of automobile parts, and provides an electronic inside rear-view mirror which comprises an MCU, an alarm assembly and an anti-dazzle assembly. The alarm assembly comprises an alarm PCBA and a reminding piece, the output end of the MCU is electrically connected with the alarm PCBA, and the alarm PCBA is electrically connected with the reminding piece; the anti-dazzle assembly comprises an anti-dazzle PCBA, sensors and an EC lens, the sensors are electrically connected with the input end of the MCU, the output end of the MCU is electrically connected with the anti-dazzle PCBA, and the anti-dazzle PCBA is electrically connected with the EC lens. Therefore, the driving safety and the anti-theft capability can be improved.

Description

Technical Field

[0001] This application relates to the field of automotive parts, and particularly to an electronic interior rearview mirror. Background Art

[0002] With the increasingly complex road environment and the continuous growth of vehicle ownership, the limitations of traditional interior rearview mirrors are gradually emerging, unable to meet the higher requirements of modern drivers for driving safety and comfort. As an indispensable visual aid tool in the cockpit, the main function of a traditional interior rearview mirror is to assist the driver in judging the vehicle distance and lane-changing timing by reflecting the road conditions behind. However, under specific light conditions, such as when driving at night and being directly illuminated by the high beams of a vehicle behind, or when the sunlight is strong during the day, traditional interior rearview mirrors often cannot effectively filter strong light, resulting in the driver's line of sight being blocked and causing a glare effect. Being in this state for a long time will not only cause the driver's visual fatigue but may also lead to temporary blindness, greatly increasing the risk of traffic accidents such as rear-end collisions and lane departures, and increasing the driving safety risk.

[0003] On the other hand, with the progress and popularization of automotive technology, vehicle theft cases have also shown a trend of diversification and high-tech. Traditional mechanical locks and simple electronic anti-theft systems are difficult to cope with increasingly complex theft methods. Against this background, integrating an anti-theft alarm function into the design of an electronic interior rearview mirror can improve the anti-theft ability.

[0004] Therefore, designing an electronic interior rearview mirror that improves driving safety and anti-theft ability is the research direction of this application. Utility Model Content

[0005] In order to improve driving safety and anti-theft ability, this application provides an electronic interior rearview mirror.

[0006] An electronic interior rearview mirror provided by this application adopts the following technical solutions:

[0007] An electronic interior rearview mirror includes an MCU, an alarm component, and an anti-glare component; the alarm component includes an alarm PCBA and a reminder, the output end of the MCU is electrically connected to the alarm PCBA, and the alarm PCBA is electrically connected to the reminder; the anti-glare component includes an anti-glare PCBA, a sensor, and an EC lens, the sensor is electrically connected to the input end of the MCU, the output end of the MCU is electrically connected to the anti-glare PCBA, and the anti-glare PCBA is electrically connected to the EC lens.

[0008] By adopting the above technical solution, the state of the reminder is controlled by receiving instructions from the MCU, which plays an alarm role to remind surrounding people or the vehicle owner of potential dangers and improve the anti-theft ability; the MCU receives the signals from the sensors and automatically adjusts the reflectivity of the mirror surface, providing a clearer and more comfortable field of view for the driver, reducing the impact of glare on driving safety, so as to improve driving safety and anti-theft ability.

[0009] Optionally, the reminder includes a sound generator and / or an alarm light.

[0010] Optionally, the sensors include an ambient light sensor and a glare light sensor.

[0011] Optionally, it further includes an assembly interface and a LIN transceiver. The assembly interface is electrically connected to the LIN transceiver, and the LIN transceiver is signal-connected to the MCU.

[0012] By adopting the above technical solution, installing the alarm component on the electronic interior mirror and sharing the assembly interface and LIN transceiver with the anti-glare component can exchange information more conveniently. At the same time, the independent LIN wires are omitted, saving the harness cost and wiring pressure, making the design of the electronic interior mirror more concise and compact, and improving reliability.

[0013] Optionally, the alarm PCBA integrates an alarm power circuit and an alarm control circuit. The alarm power circuit is electrically connected to the alarm control circuit, and the alarm control circuit is electrically connected to the reminder.

[0014] By adopting the above technical solution, when the alarm condition is met, the MCU sends an alarm instruction to the alarm PCBA. The alarm power circuit provides stable electrical energy for the alarm control circuit and the reminder. The alarm control circuit receives the instruction from the MCU and judges whether to start the alarm according to the preset logic. If the alarm condition is met, the alarm control circuit will send a control signal to the reminder to start the alarm action. The alarm PCBA integrates the alarm power circuit and the alarm control circuit and closely cooperates with the reminder to achieve an efficient and reliable alarm function.

[0015] Optionally, the anti-glare PCBA integrates an EC mirror power circuit and an EC mirror control circuit. The EC mirror power circuit is electrically connected to the EC mirror control circuit, and the EC mirror control circuit is electrically connected to the EC mirror.

[0016] By adopting the above technical solution, the MCU sends a control instruction to the anti-glare PCBA according to the received light intensity signal and the preset anti-glare logic. The EC mirror power supply circuit provides stable electrical energy for the EC mirror control circuit and the EC lens. The EC mirror control circuit receives the instruction from the MCU and adjusts the voltage or current of the EC lens according to the change of the light intensity, thereby changing the reflectivity of the lens, reducing the influence of glare on the driver's vision, and improving driving safety.

[0017] Optionally, a switch is provided on the EC mirror power supply circuit, and the MCU is connected to the switch for control.

[0018] Optionally, a filter circuit is further included, and the filter circuit is electrically connected to the assembly interface.

[0019] By adopting the above technical solution, the filter circuit can improve the overall performance of the electronic interior rearview mirror system by filtering out the noise and interference in the power signal. The reflectivity control of the EC lens will be more accurate and stable, thereby improving the anti-glare effect; the filter circuit can protect the electronic components from being damaged by noise and interference, thereby enhancing the reliability of the system, reducing the number of system failures and repairs, and reducing the use cost.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. The MCU receives the instruction sent by the vehicle body through the LIN bus, controls the state of the reminder, plays an alarm role to remind the surrounding people or the vehicle owner of potential dangers, and improves the anti-theft ability; the MCU receives the signal from the sensor, automatically adjusts the reflectivity of the mirror surface, provides a clearer and more comfortable vision for the driver, reduces the influence of glare on driving safety, and thus can improve driving safety and anti-theft ability;

[0022] 2. Installing the alarm component on the electronic interior rearview mirror and sharing the assembly interface and LIN transceiver with the anti-glare component can exchange information more conveniently. At the same time, the independent LIN wires are omitted, saving the harness cost and wiring pressure, making the design of the electronic interior rearview mirror more concise and compact, and improving the reliability;

[0023] 3. When the alarm condition is met, the MCU sends an alarm instruction to the alarm PCBA. The alarm power supply circuit provides stable electrical energy for the alarm control circuit and the reminder. The alarm control circuit receives the instruction from the MCU and judges whether to start the alarm according to the preset logic. If the alarm condition is met, the alarm control circuit will send a control signal to the reminder to start the alarm action. The alarm PCBA integrates the alarm power supply circuit and the alarm control circuit and closely cooperates with the reminder to achieve an efficient and reliable alarm function. Description of the Drawings

[0024] Figure 1 It is an exploded schematic diagram showing the internal structure of the electronic interior rearview mirror according to an embodiment of the present application;

[0025] Figure 2 It is a system schematic diagram of the connection relationship between components in the electronic interior rearview mirror according to an embodiment of the present application.

[0026] Reference numerals: 1, lens assembly; 2, mirror housing assembly; 3, warning light. Detailed implementation manners

[0027] The following further elaborates on the present application in conjunction with the attached Figure 1-2 drawings.

[0028] An embodiment of the present application discloses an electronic interior rearview mirror. Referring to Figure 1 and Figure 2 , the electronic interior rearview mirror includes an MCU, an alarm component, and an anti-glare component, and further includes a lens assembly 1 and a mirror housing assembly 2. The lens assembly 1 and the mirror housing assembly 2 are fixed by a snap connection method. The alarm component includes an alarm PCBA and a reminder. The alarm PCBA is installed between the lens assembly 1 and the mirror housing assembly 2. The output end of the MCU is electrically connected to the alarm PCBA, and the alarm PCBA and the reminder are electrically connected. After receiving a signal through the MCU, the alarm PCBA is controlled, thereby controlling the reminder to emit a reminder signal, playing a role in anti-theft.

[0029] In some embodiments, the reminder includes a sound generator and / or a warning light 3. In this embodiment, the sound generator and the warning light 3 are used simultaneously. The warning light 3 is arranged on the lower side surface of the mirror housing assembly 2, making it convenient for the driver to observe. The sound generator is a buzzer, and the sound generator is installed on the alarm PCBA. The warning light 3 and the buzzer are arranged on the electronic interior rearview mirror, making it easy for the vehicle owner to notice and not miss the alarm information when using the vehicle again; in other embodiments, only the sound generator or only the warning light 3 can be provided. In the parked and turned-off sleep state, the warning light 3 of the rearview mirror flashes once every 3 seconds, which is a normal flashing state.

[0030] When abnormal situations such as illegal opening of the door, engine hood, trunk, movement of an object inside the vehicle, or tilting of the vehicle occur, the vehicle body sends an alarm message to the MCU through the LIN bus. The MCU controls the alarm control circuit, making the flashing of the warning light 3 change from flashing once every 3 seconds to flashing once every 0.5 seconds. At the same time, the buzzer will emit a beeping alarm sound. After the alarm is completed, no further alarm will be issued to prevent disturbing the residents and excessive consumption of battery power. When using the vehicle next time, the warning light 3 on the electronic interior rearview mirror will flash quickly again and the buzzer will emit an alarm sound to remind the vehicle owner that an alarm has occurred before, allowing the vehicle owner to check the abnormal situation; if no alarm has occurred, when using the vehicle next time, the warning indicator light of the rearview mirror is in the normal flashing state of flashing once every 3 seconds, and the buzzer does not emit an alarm sound. After the vehicle starts, the warning indicator light will no longer flash.

[0031] The anti-glare component includes an anti-glare PCBA, a sensor, and an EC lens. The anti-glare PCBA is installed between the lens component 1 and the lens housing component 2. The sensor is electrically connected to the input end of the MCU, the output end of the MCU is electrically connected to the anti-glare PCBA, and the anti-glare PCBA is electrically connected to the EC lens. By controlling the anti-glare PCBA through the MCU, the reflectivity of the EC lens can be controlled, enabling the EC lens to adjust according to the ambient light, reducing the glare phenomenon for the driver, and ensuring safety during driving.

[0032] In some embodiments, the sensor includes an ambient light sensor and a glare light sensor. Based on the light intensities sensed by the ambient light sensor and the glare light sensor, the reflectivity of the EC lens is automatically adjusted, effectively reducing the glare phenomenon caused by other situations such as strong light irradiation from the rear vehicle at night.

[0033] In some embodiments, the electronic interior rearview mirror further includes a total assembly interface and a LIN transceiver. The total assembly interface is electrically connected to the LIN transceiver, and the LIN transceiver is signal-connected to the MCU. In this embodiment, the total assembly interface and the LIN transceiver are connected through the LIN BUS protocol. The LIN transceiver communicates with the MCU through the LIN bus, following the LIN communication protocol. The LIN bus in this embodiment is a low-cost serial communication protocol based on the UART interface. The alarm component and the anti-glare component share the same total assembly interface and LIN transceiver. By sharing the power supply assembly and the LIN bus, the cost of the wiring harness and the wiring complexity are significantly reduced; the number of components and the wiring complexity are reduced, making the design of the electronic interior rearview mirror more concise and compact; the number of wiring harnesses and connection points is reduced, reducing the risk of system failure caused by poor contact or wiring faults; therefore, it can not only enhance the functionality and safety of the electronic interior rearview mirror but also reduce the production cost and maintenance difficulty.

[0034] In some embodiments, the alarm PCBA integrates an alarm power circuit and an alarm control circuit. The alarm power circuit is electrically connected to the alarm control circuit, and the alarm control circuit is electrically connected to the reminder component. In this embodiment, the MCU and the alarm control circuit are connected through GPIO signals. When abnormal situations such as illegal opening of the door, hood, trunk, movement of an object inside the vehicle, or vehicle tilt occur, the LIN transceiver will issue an alarm command, and the vehicle body horn will emit an alarm sound. At the same time, the MCU controls the alarm control circuit. One minute after the vehicle stops, shuts off the engine, and locks the car, the vehicle body will send a sleep command through the LIN transceiver. After receiving the sleep command, the MCU shuts off the power supply of the EC mirror power circuit, putting the system into a low-power sleep mode to reduce the energy consumption of the vehicle body battery.

[0035] In some embodiments, the anti-glare PCBA is integrated with an EC mirror power circuit and an EC mirror control circuit. The EC mirror power circuit and the EC mirror control circuit are electrically connected, and the EC mirror control circuit and the EC mirror lens are electrically connected. In this embodiment, the MCU is connected to the EC mirror control circuit through GPIO signals. The MCU controls the power supply of the lens by sending instructions to the EC mirror control circuit, thereby controlling the reflectivity of the EC mirror lens and achieving the anti-glare function.

[0036] In some embodiments, a switch is provided on the EC mirror power circuit to control the on / off of the EC mirror power circuit; the MCU is connected to the switch for control, and in this embodiment, the MCU is connected to the switch through GPIO signals.

[0037] In some embodiments, the electronic interior rearview mirror further includes a filter circuit, and the filter circuit is electrically connected to the assembly interface. In this embodiment, electrical energy is provided to the filter circuit through the positive power supply connection, and the GND connection provides a path for the current to return to the power supply. It also serves as a common reference point for all electronic components in the system. Establishing a GND connection between the filter circuit and the assembly interface can ensure that the filter circuit is stably grounded, reducing electromagnetic interference and radio frequency interference, thereby improving the performance and reliability of the entire system. The filter circuit is connected to the MCU through MCU3V3 to stabilize the power supply voltage of the MCU and reduce power supply noise.

[0038] The implementation principle of an electronic interior rearview mirror according to an embodiment of the present application is as follows: by receiving instructions from the MCU, the state of the reminder is controlled to play an alarm role to remind surrounding people or the vehicle owner of potential dangers and improve the anti-theft ability; the MCU receives signals from the sensor and automatically adjusts the reflectivity of the mirror surface to provide a clearer and more comfortable field of view for the driver, reducing the impact of glare on driving safety, so as to improve driving safety and anti-theft ability.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electronic rearview mirror, characterized in that: It includes an MCU, an alarm component and an anti-glare component; the alarm component includes an alarm PCBA and a reminder, the MCU output end is electrically connected to the alarm PCBA, and the alarm PCBA is electrically connected to the reminder; the anti-glare component includes an anti-glare PCBA, a sensor and an EC lens, the sensors are all electrically connected to the MCU input end, the MCU output end is electrically connected to the anti-glare PCBA, and the anti-glare PCBA is electrically connected to the EC lens.

2. The electronic rearview mirror according to claim 1, characterized in that: The reminder includes a sounder and / or an alarm light.

3. The electronic rearview mirror according to claim 1, characterized in that: The sensors include an ambient light sensor and a glare light sensor.

4. The electronic rearview mirror according to claim 1, characterized in that: It also includes an assembly interface and a LIN transceiver, wherein the assembly interface is electrically connected to the LIN transceiver, and the LIN transceiver signal is connected to the MCU.

5. The electronic rearview mirror according to claim 4, characterized in that: The alarm PCBA integrates an alarm power supply circuit and an alarm control circuit, the alarm power supply circuit is electrically connected to the alarm control circuit, and the alarm control circuit is electrically connected to the reminder.

6. The electronic rearview mirror according to claim 4, characterized in that: The anti-glare PCBA integrates an EC mirror power circuit and an EC mirror control circuit, the EC mirror power circuit is electrically connected to the EC mirror control circuit, and the EC mirror control circuit is electrically connected to the EC lens.

7. The electronic rearview mirror according to claim 6, characterized in that: The EC mirror power supply circuit is provided with a switch, and the MCU is controlled and connected to the switch.

8. The electronic rearview mirror according to claim 4, characterized in that: It also includes a filter circuit, which is electrically connected to the assembly interface.

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